You paste a stack trace, a config file, a client's email into ChatGPT — and an API key or an IBAN rides along. Proxia inspects every prompt on your own device, masks what's sensitive, and restores it in the reply. Nothing is ever sent to a server.
Watch — it's already inspecting the panel. Type your own, or load an example.
To check a prompt, a cloud filter has to receive it first — so your secrets pass through someone else's server on the way to being "protected." Proxia's engine runs inside your browser. The comparison is the whole product:
A second copy of every prompt now lives somewhere you don't control. The tool meant to protect your data is itself a place it can leak.
A pure Rust core compiled to WebAssembly inspects the prompt locally. No telemetry, no beacons. The only thing that ever leaves is what you decide to send.
Regex plus algorithmic validation — Luhn, IBAN mod-97, national-ID checksums — keeps false positives low. A random 16-digit number isn't a card unless it checks out.
API keys and tokens, private-key blocks, passwords in config, connection strings.
Bank details validated, not just pattern-matched.
National IDs with real checksums, plus contact data.
Not just your data leaving — attacks coming in.
Measured by a reproducible benchmark on a labelled corpus (64 positive / 89 benign cases), per detector, gated in CI. It's a coverage guarantee on the tested cases — not a promise of catching everything in the wild. Detection is strongest in French & English today.
Type or paste into ChatGPT, Claude, Gemini — whatever you already use. Proxia stays out of the way.
In ~40 ms, on-device, before a single byte leaves. If it's clean, you never notice.
One click swaps secrets for tokens and restores them in the reply. Your call, every time.
No analytics, no beacons, no phone-home. Your prompts are never transmitted anywhere.
An optional local audit records counts only — never the sensitive text — sealed with a key only you hold.
Proxia flags, masks, and proposes. It never silently deletes your text — you keep the last word.
Agents don't just chat — they run shell commands, send email, hit APIs. A secret leaks through a tool call's arguments. Proxia inspects those and blocks a credential heading into a dangerous tool — on the browser, and directly on the MCP tool-call path.
The same on-device engine ships as a browser extension and as Office add-ins. Nothing you inspect ever leaves the machine — whichever surface catches it.
Inspects the prompts you send to an AI, and masks sensitive values displayed on any page you add.
Masks the sensitive cells — IBANs, cards, secrets — before you show the sheet in a call, a demo or an open office. Scan a selection, mask it, reveal a cell when you need it. Works in Excel desktop and Excel web, where a browser extension sees nothing at all. It protects the screen, not the file you send.
Checks the mail before it leaves your outbox, and warns you on the way out if a secret or a client's data rode along.
The Office add-ins are in private beta. Want to hear more, or try Proxia on your own spreadsheets and mailbox? Tell us what you'd put in front of it — we're looking for testers.
Get in touch →Paste something you'd normally hesitate to. Proxia is the safety net that lets you use AI without second-guessing every prompt.
Chrome Web Store · v1.0.0 · submission-ready